echo 'digraph {

"Takeru Yukawa" -> "Shin Nishida" [taillabel = "Friend of"]
"Hideto Tange" -> "Takeru Yukawa" [taillabel = "Former student of"]
"Shin Nishida" -> "Takeru Yukawa" [taillabel = "Friend of"]
}' | dot -Tsvg > output.svg